(19)

(11)

EP 0 910 588 A2

(12)

(43) Date of publication: 28.04.1999 Bulletin 1999/17 (21) Application number: 97939332.0 (22) Date of filing: 08.07.1997

(51) International Patent Classification (IPC):  B01D 1/ 22( . ) C08F 6/ 10( . ) C08F 6/ 00( . ) C08F 6/ 12( . ) (86) International application number: PCT/US1997/010102 (87) International publication number: WO 1998/002467 (22.01.1998 Gazette 1998/03)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 12.07.1996 US 19960021678P (71) Applicants: THE DOW CHEMICAL COMPANY Midland, Michigan 48674 (US) E.I. DU PONT DE NEMOURS AND COMPANY Wilmington Delaware 19898 (US)	(72) Inventors: ABEL, Richard, C., Jr. Lake Jackson, TX 77566 (US) COMBS, Robert, B. Lake Jackson, TX 77566 (US) ROWLAND, Michael, E. Lake Jackson, TX 77566 (US) SOAPE, Jerry, W. Beaumont, TX 77707 (US) SMITH, Stanley, W. Lake Jackson, TX 77566 (US) (74) Representative: Böhm, Brigitte, Dipl.-Chem. Dr., et al  Postfach 86 08 20 81635 München 81635 München (DE)